Well that's because you're locked-in :). If you're already locked in, you're screwed and have to work your way out or live with it and the consequences that come either now or later.

If I get to make the call and I care one bit about the business beyond next quarter, I would always have a clear way out to heavily reduce risks to a situation that we have seen play out many times before with the Oracles and IBMs of the world.